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14 results for “90° Coupler”
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Research ArticleOpen accessPhrase in the titleDesign of a Novel Structure SIW 90° CouplerAbdelkhalek Nasri, Hassen Zairi, Ali GharsallahThis paper focuses on the analysis of passive devices using a recent emerging technology named Substrate Integrated Waveguide (SIW). This technology has been used in the conception of planar compact components for the microwave and millimeter wave’s applications. Through using Ansoft HFSS and CST code a substrate integrated waveguide coupler has conceived and optimized in this study. The SIW 90° … …American Journal of Applied Sciences, Vol. 13, Issue 3 · 16 Mar 2016 · 7,906 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleDesign of Hybrid Coupler Connected Square Array Patch Antenna for Wi-Fi ApplicationsA. Sahaya Anselin Nisha, T. JayanthyMicrostrip patch antennas being popular because of light weight, low volume, thin profile configuration which can be made conformal. Wireless communication systems applications circular polarization antenna is placing vital role. In this study we introduce a new technique to produce circular polarization. Hybrid coupler is directly connected to microstrip antenna to get circular polarization. Also gain is further increased by … …Journal of Computer Science, Vol. 8, Issue 11 · 19 Sep 2012 · 6,638 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleA Novel Thermooptic Polymer Switch Based on Directional Coupler StructureAbu Sahmah Mohd Supa’at, Mohd. Haniff Ibrahim, Abu Bakar Mohammad et al.A novel thermooptic (TO) polymer switch based on directional coupler structure is proposed for the first time. The key element of the proposed switch is a buried square core polymer waveguides which has been designed for optimum mode matching and coupling with the single mode optical fiber configuration and have large effective index difference by the thermooptic effects. At a … …American Journal of Applied Sciences, Vol. 5, Issue 11 · 30 Nov 2008 · 6,374 accessesView PDFCite
Research ArticleOpen accessIn the keywordsCost-Effective Fabrication of Self-Made 1×12 Polymer Optical Fiber-Based Optical Splitters for Automotive ApplicationMohammad Syuhaimi Ab-Rahman, Hadi Guna, Mohd Hazwan Harun et al.Problem statement: Multimode fiber cables can conduct many light rays and can operate free of disruption and with a greater bandwidth than a wireless connection. However, due to a slight variation in the speed of the light rays through the multimode fiber, a signal transmitted by all of these rays becomes spread out. Consequently, the signals become broader and therefore … …American Journal of Engineering and Applied Sciences, Vol. 2, Issue 2 · 30 Jun 2009 · 7,925 accessesView PDFCite
Research ArticleOpen accessIn the abstractPresentation of a Mechanism with a Maltese Cross (Geneva Driver)Florian Ion Tiberiu Petrescu, Taher M. Abu-Lebdeh, Antonio ApicellaThe paper presents briefly a mechanism with a cross of Malta. The mechanisms with a Maltese cross (Geneva driver) are present in automation, robotics, mechanical transmissions, continuous variable transmissions, old clocks, especially when it comes to transmitting forces and high moments, being used instead of or with the gears. The geometry of the mechanism consisting of two elements, the kinematics … …American Journal of Engineering and Applied Sciences, Vol. 11, Issue 2 · 26 May 2018 · 8,549 accessesView PDFCite
Research ArticleOpen accessIn the abstractSmart Wireless System in Fiber to the HomeMohammad Syuhaimi Ab-Rahman, Mastang, Kamarulzaman Mat, Kasmiran JumariProblem statement: Fiber To The Home (FTTH) is optical network that play important role to carry multimedia service to customers. The failure service caused by fiber optic cut or device malfunction always happens and it cannot be avoided. Approach: To solve the failure efficiently and effectively, it is needed a real time monitoring system that can work automatically to detect … …Journal of Computer Science, Vol. 8, Issue 3 · 24 Jan 2012 · 7,107 accessesView PDFCite
Research ArticleOpen accessIn the abstractRisk Reduction in Operations, Maintenance and Application for Customer Access NetworkMohammad Syuhaimi Ab-Rahman, Siti Asma Che Aziz, Kasmiran Jumari, Nurain Izzati ShuhaimiProblem statement: This study highlight on restoration scheme proposed against failure in working line at the drop region for Fiber-To-The Home (FTTH) with a Passive Optical Network (PON). Whereas PON is a system that brings optical fiber cable and signals all or most of the way to the end user. In this study we highlighted the issue on survivability scheme … …Journal of Computer Science, Vol. 8, Issue 3 · 17 Jan 2012 · 6,928 accessesView PDFCite
Research ArticleOpen accessIn the abstractMathematical Modeling of the Three Phase Induction Motor Couple to DC Motor in Hybrid Electric VehicleZulkarnain Lubis, A. N. Abdalla, Mortaza, Ruzlaini GhonProblem statement: With emphasis on a cleaner environment and efficient operation, vehicles today rely more and more heavily on electrical power generation for success. Approach: Mathematical modeling the components of the HEV as the three phase induction motor couple to DC motor in hybrid electric vehicle was introduced. The controller of Induction Motor (IM) was designed based on input-output feedback … …American Journal of Engineering and Applied Sciences, Vol. 2, Issue 4 · 31 Dec 2009 · 8,309 accessesView PDFCite
Research ArticleOpen accessIn the abstractSolving the Near-Far Problem in Dynamic Frequency Hopping-Optical Code Division Multiple Access using Power ControlW. J.M. Al-galbi, M. Mokhtar, A. F. Abas et al.Problem statement: In this study, a distributed power control algorithm is proposed for Dynamic Frequency Hopping Optical-CDMA (DFH-OCDMA) system. Approach: In general, the DFH-OCDMA can support higher number of simultaneous users compared to other OCDMA techniques. However, the performance of such system degrades significantly as the received power does lower than its minimum threshold. Results: This may obviously occur in … …Journal of Computer Science, Vol. 5, Issue 6 · 30 Jun 2009 · 7,521 accessesView PDFCite
Research ArticleOpen accessIn the abstractCar Safety System Using Fuzzy LogicMazin Al-Hadidi, Yasir Khalil Ibrahim, Yarob Adnan IstitiehNowadays everybody can recognize the huge increasing of car numbers on roads. Day after day, this increasing may be an indicator for changing and development. This put a lot of challenges on people and governments. One of these challenges is car accidents and there bad effects. The main aim of our proposal is to help our society to decrease car … …Journal of Computer Science, Vol. 4, Issue 12 · 31 Dec 2008 · 7,157 accessesView PDFCite